Michael Callahan
NPI 1023972684 · Marriage & Family Therapist · San Dimas, CA
Michael Callahan is a Marriage & Family Therapist provider in San Dimas, CA (NPI 1023972684).
Provider details
- NPI number
- 1023972684
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 159885 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-12-09
- Last updated
- 2025-12-09
- Certified
- 2025-12-09
Frequently asked questions
- What is Michael Callahan's NPI number?
- Michael Callahan's National Provider Identifier (NPI) is 1023972684, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Callahan's specialty?
- Michael Callahan is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Michael Callahan located?
- Michael Callahan's practice location on file with NPPES is 1111 W Covina Blvd, San Dimas, CA 91773-3205.
- What is Michael Callahan's phone number?
- The practice phone number listed in the NPPES registry for Michael Callahan is (909) 979-3722.
- Is Michael Callahan's NPI active?
- Yes — Michael Callahan's NPI (1023972684) is active in the NPPES registry as of the last update on 2025-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.